Surgical stapler apparatus
First Claim
1. A circular anastomosis surgical instrument comprising a body having circular anastomosis means at its distal end, a longitudinally extendable central main shaft and a distal tip assembly having a separate shaft segment, and mounting means for securing said main shaft to said separate shaft segment, said mounting means including at least one detent mounted for radial movement for frictionally connecting said separate shaft segment and said central main shaft.
2 Assignments
0 Petitions
Accused Products
Abstract
The end-to-end anastomosis apparatus is provided with a mounting means which can receive a trocar for making holes in tissue and, subsequently, an anvil shaft for the mounting of an anvil assembly for stapling purposes. The anvil shaft is provided with splines which cooperate with splines on a shell liner within the housing of the apparatus to align the buckets on the anvil assembly with the staples in a cartridge secured in the apparatus. In addition, the anvil assembly is provided with a spring for locking of the anvil housing on the anvil shaft.
355 Citations
53 Claims
- 1. A circular anastomosis surgical instrument comprising a body having circular anastomosis means at its distal end, a longitudinally extendable central main shaft and a distal tip assembly having a separate shaft segment, and mounting means for securing said main shaft to said separate shaft segment, said mounting means including at least one detent mounted for radial movement for frictionally connecting said separate shaft segment and said central main shaft.
- 4. The surgical apparatus of 1 wherein said separate shaft segment defines a recess configured and dimensioned to receive said at least one detent.
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14. A surgical stapler apparatus comprising:
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a tubular housing having a longitudinal axis; a staple pusher assembly movably mounted in the distal end of said housing for movement between a retracted position within said housing and an extended position for expelling an annular array of staples therefrom; an anvil assembly; means mounted concentrically within said staple pusher assembly for releasably mounting said anvil assembly therein; and means for moving said mounting means along the longitudinal axis between a retracted position for preventing removal of said anvil assembly and an extended position for permitting removal of said anvil assembly. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of operating a surgical stapling instrument comprising the steps of:
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a) providing a surgical stapler apparatus having; (i) a tubular housing; (ii) a staple pusher assembly movably mounted in the distal end of said housing for movement between a retracted position within said housing and an extended position for expelling an annular array of staples therefrom; (iii) first actuating means for moving said staple pusher assembly between said staple pusher retracted position and said staple pusher extended position; (iv) mounting means movably mounted within said staple pusher assembly for releasably engaging an anvil assembly; and (v) second actuating means connected to said mounting means for moving said mounting means between at least a mounting means retracted position preventing removal of said anvil assembly and a mounting means extended position permitting release of said anvil assembly; b) engaging an anvil assembly to said mounting means with said mounting means in said extended position; and c) operating said second actuating means to move said mounting means to said mounting means retracted position. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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40. A method of operating a surgical stapling instrument comprising the steps of:
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a) providing a surgical stapler apparatus having; (i) a tubular housing; (ii) a staple pusher assembly movably mounted in the distal end of said housing for movement between a retracted position within said housing and an extended position for expelling an annular array of staples therefrom; (iii) first actuating means for moving said staple pusher assembly between said staple pusher retracted position and said staple pusher extended position; (iv) mounting means movably mounted within said staple pusher assembly for releasably engaging an anvil assembly; (v) second actuating means connected to said mounting means for moving said mounting means between at least a mounting means retracted position preventing removal of said anvil assembly and a mounting means extended position permitting release of said anvil assembly; and (vi) an anvil assembly for releasably engaging said mounting means; b) activating said second actuating means to move said mounting means to said extended potion; and c) disengaging said anvil assembly from said mounting means.
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41. A surgical apparatus for forming a circular anastomosis comprising:
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a tubular housing having a longitudinal axis; a distal tip assembly; means for forming a circular anastomosis, said circular anastomosis means movably mounted in the distal end of said housing for movement between a retracted position spaced apart from said distal tip assembly and an extended position for forming a circular anastomosis in tissue disposed between said circular anastomosis means and said distal tip assembly; and means mounted concentrically within said circular anastomosis means for releasably mounting said distal tip assembly, said mounting means being movable along said longitudinal axis between a retracted position for preventing removal of said distal tip assembly and an extended position for permitting removal of said distal tip assembly. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48)
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49. A method of operating a surgical instrument for forming a circular anastomosis comprising the steps of:
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a) providing a surgical stapler apparatus having; (i) a tubular housing; (ii) a distal tip assembly; (iii) means for forming a circular anastomosis, said circular anastomosis means movably mounted in the distal end of said housing for movement between a retracted position spaced apart from said distal tip and an extended position for forming a circular anastomosis in tissue disposed between said circular anastomosis means and said distal tip assembly; (iv) first actuating means for activating said circular anastomosis means; (v) mounting means movably mounted concentrically within said circular anastomosis means for releasably engaging said distal tip assembly; and (vi) second actuating means connected to said mounting means for moving said mounting means between at least a mounting means retracted position for preventing removal of said distal tip assembly and a mounting means extended position permitting release of said distal tip assembly; b) engaging a distal tip assembly to said mounting means with said mounting means in said extended position; and c) operating said second actuating means to move said mounting means to said mounting means retracted position. - View Dependent Claims (50)
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- 51. In a circular anastomosis surgical stapling instrument including a staple-carrying assembly at its distal end, a centered longitudinally extensible main shaft and an anvil opposed to said staple-carrying assembly, the improvement which comprises a removable, separate shaft segment longitudinally slidably engageable with an end portion of said main shaft, said shaft segment having a free end and an end carrying said anvil.
Specification